Improvement in automatic boiler-feed regulators



omU.` oOo POD ooo `O fenv@ oOo oOo oOo 00 OOO oOo r. BRETTI :Automatic Boiler` Feed-Regulattlrs.

QOOOOO UNITED STATES PATENT OEEIoE.

BUnT BRETT, 0E GENEVA, OHIO.`

IMPROVEMENT IN AUTOMATIC BOlLER-FEED` REGULATORS.

Specification forming part of Letters Patent No. 139,762, dated June 10, 1873; application led June 17, 1872. A Y

To all whom it may concern.'

Be it known that I, BURT BRETT, of Geneva., Ashtabula county, State of Ohio, have invented certain Improvements in Automatic Boiler-Feed Regulators, of which the following is a specification:

The first part ofmy invention relates to the construction of a rotary valve for the regulation ofthe supply ot' steam from a steam-generator for the operation ot' a steam pump or injector for feeding steam-boilers with supply- Water, in `such a manner as to permit each instant an amount of steam 'to escape from the valve sufcient to snpplythe steam pump or injector for its operation, and secure such a manner and degree ot' action as may be nec-v essary to keep a uniform level of water in the boiler, by means of the combination ot said valve with a metallic oat consisting of a hollow sphere resting in the waterin the interior of the boiler, by automatic action resulting from the changes of the level of the water in the boiler; the object of this part of my invention beingto furnish supply-waterfor theboiler by th'e automatic action of the parts hereinat' ter described, and to secure a regular and adequate supply of water, and attain security against explosions. The second part of my invention relates to the construction and combination of the chamber of a boiler-feed regulator containing` the oat and other parts of the machine hereinafter described, with the upper transverse section of Weston and Bretts safety-boiler, patented bythe United States, September 27, 1870, and substituting said chamber for a number of the vertical branches of the upper transverse tube of said boiler,u and constructing the bottom of the chamber in such a manner as to admit of the connection of the sectional parts of the firebox with the base of the upper transverse section, as hereby modified, in a convenient manner.

Figure 1 is a side elevation of the upper transverse section of VVestons and Bretts safety-boiler, in combination with the parts embodying my invention. Fig. 2 is a pla-n of the lower side of the base of the same. Fig. 3 is a sectional elevation of the parts of the machine embodied in my invention, showing those parts in a transverse vertical plane extending from the center of the front to the center ofthe rear of the chamber B in Fig. 1. Fig. 4 is an elevation ofthe valve, and shows the parts enlarged. Fig. 5 is a plan of the valve.

A is a metallic ioat, consisting ot'a hollow sphere with a stem, t, above the tioat, connected with the ends ot' levers d and h. Lever d is also connected by set-screws ff with the seat of valve (l, and lever l1l is connected with the end of a bolt, E, which extends through the side ofthe chamber B near the bottom of the dome ofthe chamber above the ilange. a Valve C and bolt E are each secured in their` places by nuts m m screwed firmly down upon packing t Z, and held by jam-nuts n n. B is a chamber elevated from the base of the upper transverse section of Weston and Bretts safety-boiler above mentioned, and intersecting the transverse tube, having flanges M N a little above the transverse section, for the attachment offthe upper part, constituting the dome of the chamber. The chamber is of sufficient diameter to include a number ofthe vertical branches I I of the transverse section, and is substituted for them, and is so con-` structed as to admit ofthe connection with the lower side of its base of the sectional parts of the nre-box below the transverse section. The dome of the chamber is adapted to attachment to the upper parts of steamfboilers of ordinary forms, in such a manner as` to permit the loat A to rest in the water of the boiler. C is the valve and F the seat `of l the valve for the escape of steam from the chamber for the supply ot' a steam pump' or iniector, constructed inisuch a manner, with setscrews f f and jam-nutsfg g, as to actfreely and with security against derangement, and permit a constant supply of steam for the operation of the steam pump or injector, exactly part of the valve-seat from the axis on which the valve rotates, and the valve is adjusted a from the valve above described to the steam in such a manner that the convex part of the.

valve is nearly but not in perfect contact With the concave part of the valve-seat. The opening o of the-valve-seat is enlarged on the lower side, as represented in Fig. 4, in such a manner as to effect a gradual increase ofthe iiovv of steam through the valve by the rotation of the valve toward the opening, and thus regulate the escape of the steam, the objects being to secure the constant passage through the valve of steam sufficient to cause a constant moderate action of the steam-pump, and admit an increasing supply of steam and corresponding action of the pump, graduated and regulated automatically by the action of the parts, and also secure a free action of all the parts, avoiding friction which would result from steam-tight contact of parts. The upper side of the valve is also constructed so as to rise above the valve-seat sufficiently to prevent the escape of steam above the valve.

D is the pipe, upon the end of which the valve C and valve-seat F are constructed, as above described, and extends from the interior of the chamber near the top of the dome through the side ofthe chamber in a line with and above the bolt E, and is secured in its place by a nut, m, screwed firmly down' upon packing l, and held by a jam-nut, n, for the purpose of conduct-ing 'the steam escaping pump or injector by a pipe continued fromv A pipe D.

The valve C is operated by the vertical action of the float A. As the v water in the boiler sinks the iloat descends and carries with it the end of lever d attached to the stem 'i of the ioat, and opens the valve C so as to permit the escape ofa greater amount of steam from the chamber, by which the action of the steam pump or injector is increased, and a larger supply of Water afforded to the boiler, in consequenceof which the Water in the chamber is raised and carries with it the float up- Ward, and tends to close the valve C and check the supply of Water to the boiler; the action of the parts Will soon find an equilibrium, and continue such as to preserve a uniform level of the Water in the boiler.

I claim as my inventionl. The construction and combination of the valve C with the float A, substantially as and for the purposes hereinbefore set forth.

2. The combination of the valve C, oat A, chamber B, and the upper transverse section of Weston and Bretts safety boiler, above mentioned, substantially as and for the purposes hcreinbefore -set forth.

BURT BRETT.

Witnesses:

DENNrs THOR?, Trios. F. PALMER. 

